International comparison CCQM-P41 Greenhouse gases. 2. Direct comparison of primary standard gas mixtures

In this second part of this study, primary standard gas mixtures (PSMs) as used for calibrations for the greenhouse gases carbon dioxide and methane have been compared. The nominal amount-of-substance fraction levels were 365 µmol/mol for carbon dioxide and 1.8 µmol/mol for methane. The matrix was s...

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Bibliographic Details
Published in:Metrologia 2007-01, Vol.44 (1A), p.08003-08003
Main Authors: Veen, Adriaan M H van der, Brinkmann, Freek N C, Arnautovic, Mile, Besley, Laurie, Heine, Hans-Joachim, Esteban, Teresa Lopez, Sega, Michela, Kato, Kenji, Kim, Jin Seog, Castorena, Alejandro Perez, Rakowska, Agata, Milton, Martin J T, Guenther, Frank R, Francey, R, Dlugokencky, E
Format: Article
Language:English
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Summary:In this second part of this study, primary standard gas mixtures (PSMs) as used for calibrations for the greenhouse gases carbon dioxide and methane have been compared. The nominal amount-of-substance fraction levels were 365 µmol/mol for carbon dioxide and 1.8 µmol/mol for methane. The matrix was synthetic air, simulated by a mixture of nitrogen, oxygen (209 mmol/mol) and argon (9.3 mmol/mol). The measurements took place in the spring of 2003. In the protocol, it was foreseen to have the PSMs produced for this study in a small range, enabling regression analysis on the data to assess the consistency of the gas mixtures.
ISSN:0026-1394
1681-7575
DOI:10.1088/0026-1394/44/1A/08003